On 10/6/2011 4:54 AM, Emmanuel Roche wrote:
Hi everyone,
I have a simple question regarding pre/post render cameras:
- suppose I have a scene graph under a viewer camera
- the scene data for this camera starts with a root group.
- somewhere in that root group, I add a pre_render camera, to render a texture
on an FBO, and as a child of that pre render camera... I use the root group
itself !...
OSG scene graphs must be acyclic, so don't do that.
What would be the behavior in that case ?
- Would OSG notice that the pre_render camera is to be rendered before but
render it only once
- Or would OSG fail to notice this and prepare "pre-pre-pre... pre-render"
stages forever ? (and actually freeze completely) ?
I'm guessing it would infinite loop, but there's no need to speculate: try it
and see for yourself. :-)
Or is there a way to achieve what I want to do here properly if this option is
known to block ?
Multiparent your scene, once to the pre-render camera, and once again to the
root camera (which would also have the pre-render camera as a child).
-Paul
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